Q91.1 Trisomy 18, mosaicism (mitotic nondisjunction)

Instructional Notes:

Q91.1
Description: Trisomy 18, mosaicism (mitotic nondisjunction)
↓
Q91
Description: Trisomy 18 and Trisomy 13
↓
Q90-Q99
Description: Chromosomal abnormalities, not elsewhere classified (Q90-Q99)
Exclude2:
- mitochondrial metabolic disorders (E88.4-)
↓
Q00-Q99
Description: Congenital malformations, deformations and chromosomal abnormalities
Exclude2:
- inborn errors of metabolism (E70-E88)
Notes:
- Codes from this chapter are not for use on maternal records